Quick question

I went off bc in October, I was having regular periods up until this month, so far af is 3 or 4 days late. I hade to go to the hospital last Tuesday for an infection and they gave me a pregnancy test, it was negative, so I haven't tested again.

Should I be worried, that af is late or is this normal after stopping bc? Should I go to the doctor?

Any advice is much appreciated 😊